Grate-bar



-i TED STATES PATENT WM. FERREL, OF CHARLESTON DISTRICT, SOUTH CAROLINA.

GRATE-BAR.

Specicaton of Letters Patent No. 3,059, dated April 25, 1843.

y tion.

to any of the ordinary known size, or sizes,

of the ordinary fire bar or grating, now in common or in general use, areference being had to the accompanying drawings, in the which- Figurel, is a perspective view, of a single length of my ire proof bar orgrating, with Vone end of it left open, as is shown at letter F, so asto admit if necessary anaddit-ional length. Fig. 2 represents aperspective view of two lengths of my re proof bar or grating, connectedor joined by a center re proof bearernas shown at letter Gr. Fig. 3represents a perspective view of my ire proof bearer. Fig. 4, representsarsectional view of my fire proot1 bearer. Fig. 5 represents sectionalviews, of my iire proof bar or grating.

To enable others skilled in the art to make, form, construct, and use,this my discovery and improvement, I will proceed to describe its make,form, construction, use and adapta tion, to all steam power, agency, orengines in mechanical use and operation.

I construct, and cast this my improvement of fire proof bar or grating,in any of the known forms, make, or model excepting of this mydiscovery, invention and new and useful improvement, of making, forming,construct-ing, and providing a cavity inthe bar or grating, whichcavity, I call the ashes cavity, and which I fill with ashes, and asshown in the accompanying Vdrawings at letters A, and also, as shown inthe sectiona drawings at letters a a. V

The space or r4opening between my iire proof bar or grating, as shown inthe accompanying drawings, at letters C, represents the necessary spaceor opening, which ad- Y mits a free circulation or draft, between thebar or grating, which action and eiect in common, with the ashes cavitydoes4 contribute to lessenV and prevent, any undue degree oftemperature, to fuse and destroy, the metal, of my re proof bar orgrating.`

The bearer of my fire proof bar or grating, I make, form, construct andcast after f f the accompanying drawings, as shown at,

letters D, in the perspective and sectional drawings. The bottom of thesaid fire proof bearer I construct, and cast from one inch to, any ofthe ordinary known size or sizes,

of the ordinary fire bar or grating, now'in' common, and in general use.

I/Vhat I claim as my discovery, invention, and new and usefulimprovement, on the ordinary re bar or grating-is this of my inventionand improvement, of-

Forming and adapting a cavity,in my fire proof bar or grating, which Ill with ashes, and which I call the ashes cavity, the principle,operation, and use of the said-ashes cavity, when filled wit-h ashes,it`being a nonconductor of heat, operates, in its effect, to preventthat excess of temperature on the metal, thereby rendering my fire proofbar or grating more durable, and capable of bearing the heat, which doesin common and in general fuse or melt and destroy the ordinary re bar orgrating, as is now in common and in general use, using for that purposecast, wrought iron, or any other metal or .metallic compound which maybe used for the intended purpose and effect.

WM. FERREL. Witnesses:

THOMAS R. SALTAR, ROBT. L. BAKER.

